<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

</body>
<script>
    // let name = 11
    // console.log(uname);
    function fn(x, y) {
       let uname = "chong1"
       let aa = "23689"
        console.log(this);
        console.log(x + y);
        console.log(uname);
        console.log(this.uname);
    }
    let ii = {
        uname: 'fengdong'
    }
    // fn(1, 2)
    fn.call(ii,1,7)

</script>

</html>